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If the screws are attached to ONLY the furnace sides and not the
bottom, the straps must be vertical against the furnace sides and
not pull away from the furnace sides, so that the strap attachment
screws are not in tension (are loaded in shear) for reliable support.
Platform Furnace Support
Construct working platform at location where all required furnace
clearances are met. (See Fig. 2 and 17.) For furnaces with 1- -in.
clearance requirement on side, set furnace on noncombustible
blocks, bricks or angle iron. For crawl space installations, if the
furnace is not suspended from the floor joists, the ground
underneath furnace must be level and the furnace set on blocks or
bricks.
Roll- -Out Protection
Provide a minimum 17- -3/4 in. X 22 in. piece of sheet metal for
flame roll- -out protection in front of burner area for furnaces
closer than 12 inches above the combustible deck or suspended
furnaces closer than 12 inches to joists. The sheet metal MUST
extend underneath the furnace casing by 1 in. with the door
removed.
The bottom closure panel on furnaces of widths 17- -1/2 in. and
larger may be used for flame roll- -out protection when bottom of
furnace is used for return air connection. See Fig. 17 for proper
orientation of roll- -out shield.
Bottom Return Air Inlet
These furnaces are shipped with bottom closure panel installed in
bottom return- -air opening. Remove and discard this panel when
bottom return air is used. To remove bottom closure panel,
perform the following:
1. Tilt or raise furnace and remove 2 screws holding bottom
filler panel. (See Fig. 9.)
2. Rotate bottom filler panel downward to release holding
tabs.
3. Remove bottom closure panel.
4. Reinstall bottom filler panel and screws.
Side Return Air Inlet
These furnaces are shipped with bottom closure panel installed in
bottom return- -air opening. This panel MUST be in place when
side return air inlet(s) is used without a bottom return air inlet.
Not all horizontal furnaces are approved for side return air
connections. (See Fig. 20.)
FILTER ARRANGEMENT
WARNING
!
CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in personal
injury, death and/or property damage.
Never operate a furnace without a filter or with filter access
door removed.
There are no provisions for an internal filter rack in these
furnaces.
Refer to the instructions supplied with Media Cabinet for
assembly and installation options.
A field- -supplied accessory external filter rack is required.
This furnace requires KGAFR030ALL 1 in. external filter rack or
a suitable field- -supplied substitute, such as the media cabinet.
Refer to the instructions supplied with external filter rack for
assembly and installation options.
13
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